1. 1 Type: model:periodicalitem and TEXT Language: English Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
2. 1 Type: model:periodicalitem and TEXT Language: English Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3. 2 Type: model:periodicalitem and TEXT Language: English Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
4. 2 Type: model:periodicalitem and TEXT Language: English Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
5. 3 Type: model:periodicalitem and TEXT Language: English Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
6. 4 Type: model:periodicalitem and TEXT Language: English Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
7. Publications of the Astronomical Institute of the Academy of Sciences of the Czech Republic Type: model:periodicalitem and TEXT Language: Czech and English Description: 85 and Daily relative sunspot numbers 1818 - 1848: reconstruction of missing observations Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
8. Publications of the Astronomical Institute of the Academy of Sciences of the Czech Republic Type: model:periodicalitem and TEXT Language: Czech and English Description: 84 and Supplement of the Catalogue of Polar Aurorae < 55° N in the Period 1000 - 1900 Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public